Improvement of Response Time and Heat-Transfer Capacity of Metamaterial Absorber for Terahertz Detector Applications

We have introduced a THz metamaterial absorber (MMA) system that consists of a metal disk antenna connected to successive dielectric and metal layers via a metal rod. The heat-transfer speed and capacity of the proposed platform with a metal rod inserted through the dielectric layer have been numerically studied for the first time in this work. The proposed THz MMA system can improve the heat-transfer capacity of 0.7 K/s compared to without a metal rod situation. The simulation proves that heat transfer can be achieved in the proposed absorber less than
$10 ~\mu \text{s}$
times compared to without a metal rod case. The simulation results indicate that the absorption strength of the MMA is almost independent of the rod depth. This detector system will be remarkably beneficial for imaging applications where fast heat-signal conversion is necessary.